A lifting device

Abstract

The utility model discloses a kind of lifting devices, it is related to mechanical device field, comprising: drive assembly;Rotary pole body, by the first pole body of several head-to-tail joint constitutes, rotary pole body is connected with the output end of drive assembly;Lifting assembly is set on the first pole body, and is used for traction mounting pole body, every lifting assembly includes rope body, hook and take-up assembly, take-up assembly is sleeved on rotary pole body, one end of rope body is wound on take-up assembly, screw take-up groove for accommodating rope body is equipped on take-up assembly, the other end of rope body is equipped with hook;Mounting pole body, by the second pole body of several head-to-tail joint constitutes;Several support assemblies are set on rotary pole body, and rotationally connected with rotary pole body.The utility model drives rotary pole body transmission by drive assembly, fundamentally guarantees the absolute synchronization of all lifting points on rotary pole body, eliminates the error, delay and fault risk that electronic synchronization can exist.

Description

Technical Field

[0001] This utility model relates to the field of mechanical devices, specifically to a lifting device. Background Technology

[0002] In fields such as industrial automation, modern agriculture, and smart lighting, lifting devices are key equipment for achieving functions such as material handling, equipment positioning, and lighting adjustment. Depending on the application scenario, the technical requirements for lifting devices vary, but the following aspects are generally present: First, the need for synchronous and precise lifting of multiple work points to maintain a horizontal working plane or a specific spatial layout; second, a requirement for safe and reliable lifting processes, with protection against falls, overloads, and overtravel; third, a desire for good environmental adaptability and installation compatibility, enabling convenient installation on support surfaces of different materials such as concrete, steel structures, and wooden structures; and fourth, a compact structure and small packaging and transportation volume to reduce warehousing and logistics costs.

[0003] Current lifting devices generally suffer from poor synchronization. When lifting at multiple points, these devices rely on complex and expensive synchronization control systems, or bulky mechanical synchronization mechanisms that accumulate large errors. Furthermore, to achieve specific functions such as multi-point synchronization and long stroke, these lifting devices typically require customized designs or the use of high-precision components, resulting in high overall costs.

[0004] Therefore, there is an urgent need for a lifting device that can effectively solve the above problems and achieve multi-point, long-distance, high synchronization accuracy, and high safety factor. Utility Model Content

[0005] In view of this, the present invention provides a lifting device to solve the problem of poor synchronization that is common in current lifting devices.

[0006] According to a first aspect, the present invention provides a lifting device, comprising: Driver components; The rotating rod is composed of several first rods connected end to end, and the rotating rod is connected to the output end of the drive assembly; A lifting assembly is mounted on the first pole body and is used to pull and hang the pole body. Each first pole body is provided with one of the lifting assemblies. Each lifting assembly includes a rope, a hook, and a take-up assembly. The take-up assembly is sleeved on the rotating pole body. One end of the rope is wound around the take-up assembly. The take-up assembly is provided with a threaded take-up groove for accommodating the rope. The other end of the rope is provided with a hook. The mounting pole is composed of several second poles connected end to end, and each of the ropes is connected to a second pole through the hook; Several support components are disposed on the rotating rod body, rotatably connected to the rotating rod body, and the support components are used for fixed connection with the installation position.

[0007] In conjunction with the first aspect, in the first embodiment of the first aspect, the take-up assembly includes a first sleeve, a second sleeve, a first connector, a second connector, and a take-up ring; Both the first and second sleeves extend axially. The outer walls of the first and second sleeves are respectively provided with a first take-up groove and a second take-up groove. The inner walls of the first and second sleeves are respectively provided with a first receiving cavity and a second receiving cavity. The two ends of the first and second sleeves are respectively connected by the first connector and the second connector. The second connector is provided with a take-up loop for the rope to pass through. After the first ferrule and the second ferrule are connected to each other, the first take-up groove and the second take-up groove form the threaded take-up groove, and the first receiving cavity and the second receiving cavity together constitute the first rod cavity through which the first rod body passes.

[0008] In conjunction with the first embodiment of the first aspect, in the second embodiment of the first aspect, the first sleeve is provided with a first mounting hole and a second mounting hole at both ends, the second sleeve is provided with a third mounting hole and a fourth mounting hole at both ends, the first connector cooperates with the first mounting hole and the third mounting hole, and the second connector cooperates with the second mounting hole and the fourth mounting hole.

[0009] In conjunction with the first aspect, in the third embodiment of the first aspect, the support assembly includes a first mounting base, a rotating base, a first mounting member, and a second mounting member; The rotating seat is provided with a rotating sleeve, the first rod body is rotatably connected to the rotating sleeve, the rotating seat is connected to the first mounting seat through the first mounting component, and the first mounting seat is connected to the installation position through the second mounting component.

[0010] In conjunction with the third embodiment of the first aspect, in the fourth embodiment of the first aspect, the rotating seat is provided with a connecting gasket, the rotating seat is mounted on the first mounting seat through the connecting gasket, and the first mounting component is connected to the first mounting seat through the connecting gasket.

[0011] In conjunction with the first aspect, in the fifth embodiment of the first aspect, the drive component is connected to the second mounting base via a drive mounting base, and the second mounting base is connected to the mounting position via a third mounting member.

[0012] In conjunction with the first aspect, in the sixth embodiment of the first aspect, a counterweight is provided at the end of the hook that is connected to the second rod.

[0013] In conjunction with the first aspect, in the seventh embodiment of the first aspect, the first rods are detachably connected.

[0014] In conjunction with the first aspect, in the eighth embodiment of the first aspect, the second rods are detachably connected.

[0015] In conjunction with the first aspect, in the ninth embodiment of the first aspect, the driving component is provided with a limit protection component.

[0016] The lifting device of this utility model: By driving the rotating rod, which serves as the main drive shaft, the absolute synchronization of all lifting points on the rotating rod is fundamentally guaranteed. This eliminates the errors, delays, and malfunctions that may exist in electronic synchronization, resulting in high synchronization accuracy and reliable operation. Both the rotating rod and the mounting rod are composed of multiple rods connected end to end. This modular installation design facilitates storage before assembly, greatly reducing the volume of packaging and transportation, and effectively improving the volume ratio and space utilization of the packaging. When assembling the rotating rod and the mounting rod, the required number of the first rods can be determined according to the actual working conditions, thus forming rotating rods and mounting rods of different lengths to adapt to different working conditions. By increasing or decreasing the number of the first rods of the rotating rod, the number of lifting components can be increased or decreased accordingly. The number and spacing of lifting points can be flexibly configured to meet the span requirements from several meters to tens of meters or even longer, with a very wide range of applications. The threaded take-up groove on the take-up assembly allows a single lifting component to both meet the lifting requirements and smoothly take up the line. The single drive source component saves the cost of multiple drive sources and complex control systems. Mechanical synchronization reduces the complexity and cost of the control system, thereby reducing production costs. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] in: Figure 1 A schematic diagram of the lifting device provided by this utility model is shown; Figure 2 An exploded schematic diagram of the lifting device provided by this utility model is shown; Figure 3 This invention provides a schematic diagram of the extended installation structure of the lifting device. Figure 4This invention provides a schematic diagram of the structure of the drive assembly in the lifting device. Figure 5 This invention provides a schematic diagram of the structure of the controller in the lifting device. Figure 6 This invention provides a schematic diagram of the structure of the support component in the lifting device. Figure 7 An exploded view of the support assembly in the lifting device provided by this utility model is shown. Figure 8 This invention provides a schematic diagram of the structure of the rotating seat in the lifting device. Figure 9 This invention provides a schematic diagram of the structure of the cable winding assembly in the lifting device. Figure 10 An exploded view of the cable winding assembly in the lifting device provided by this utility model is shown.

[0019] In the diagram: 10-Drive assembly; 11-Controller; 12-Drive mounting base; 13-Second mounting base; 14-Third mounting component; 15-Limit protection assembly; 20-Rotating rod; 21-First rod; 30-Lifting assembly; 31-Rope; 32-Take-up assembly; 321-First ferrule; 322-Second ferrule; 323-First connector; 324-Second connector; 325-Take-up ring; 33-Hook; 34-Counterweight; 40-Hanging rod; 41-Second rod; 50-Support assembly; 51-First mounting base; 52-Rotating base; 53-First mounting component; 54-Second mounting component; 55-Rotating sleeve. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0022] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0023] In fields such as industrial automation, modern agriculture, and smart lighting, lifting devices are key equipment for achieving functions such as material handling, equipment positioning, and lighting adjustment. Depending on the application scenario, the technical requirements for lifting devices vary, but the following aspects are generally present: First, the need for synchronous and precise lifting of multiple work points to maintain a horizontal working plane or a specific spatial layout; second, a requirement for safe and reliable lifting processes, with protection against falls, overloads, and overtravel; third, a desire for good environmental adaptability and installation compatibility, enabling convenient installation on support surfaces of different materials such as concrete, steel structures, and wooden structures; and fourth, a compact structure and small packaging and transportation volume to reduce warehousing and logistics costs.

[0024] Currently, the most common lifting devices on the market can be divided into the following categories: Single-point hydraulic / pneumatic lifting devices: These devices use hydraulic cylinders or pneumatic cylinders as the driving source, resulting in large thrust. However, they require complex hydraulic or pneumatic piping systems, making it difficult to achieve high-precision synchronization at multiple points. The systems are also large and pose a risk of leakage.

[0025] Single-point electric linear actuators: These have a relatively simple structure and are easy to control, but typically have limited thrust and stroke. When multi-point synchronization is required, each point needs to be equipped with an independent linear actuator and motor, which is costly and complex to synchronize, requiring extremely high precision from the control system.

[0026] A winch combined with a pulley system can achieve lifting over a certain distance, but traditional winches are large and heavy, and inconvenient to install. For multi-point lifting, multiple winches or complex wire rope guiding and branching mechanisms are required, resulting in a large system footprint and difficulty in ensuring synchronization.

[0027] Scissor lifts or telescopic lifts: mainly used for centralized lifting of large loads and limited heights. Their structure makes them unsuitable for synchronous lifting applications requiring multiple points and long strokes, and their structure occupies a large amount of space.

[0028] It can be seen that current lifting devices generally suffer from poor synchronization. When lifting at multiple points, these devices rely on complex and expensive synchronization control systems, or bulky mechanical synchronization mechanisms that accumulate large errors. Moreover, in order to achieve specific functions such as multi-point synchronization and long stroke, these lifting devices usually require customized designs or the use of high-precision components, resulting in high overall costs.

[0029] Therefore, there is an urgent need for a lifting device that can effectively solve the above problems and achieve multi-point, long-distance, high synchronization accuracy, and high safety factor.

[0030] To solve the above problems, a lifting device is provided in this specification. For example... Figures 1 to 10 As shown, the lifting device includes: The drive component 10, which serves as the core drive source, can be a motor, a combination of a motor and a reducer, etc. Correspondingly, a controller 11 is provided on the drive component 10, and the user can control the drive component 10 to start, stop and adjust various parameters during operation through the controller 11.

[0031] Preferably, the controller 11 can be set with a torque limit. When the load increases abnormally (such as jamming) and exceeds the set value, the drive component 10 automatically stops and triggers an alarm.

[0032] In this embodiment, the drive component 10 is connected to the second mounting base 13 via the drive mounting base 12, and the second mounting base 13 is connected to the mounting position via the third mounting member 14.

[0033] Under different operating conditions, the lifting device needs to be installed on corresponding locations such as cement roofs and wooden roofs. The third mounting component 14 can use fastening parts such as screws and studs. In this way, the drive assembly 10 mounted on the drive mounting base 12 can be installed in the required installation position through at least one third mounting component 14 and the second mounting base 13. Correspondingly, the second mounting base 13 can be provided with a number of mounting holes, which are used to cooperate with the third mounting component 14 for corresponding installation, positioning and fixing of the third mounting component 14.

[0034] In this embodiment, the drive assembly 10 is also provided with a limit protection assembly 15. When the mounting rod 40 rises to the highest limit position, the mounting rod 40 will contact the limit protection assembly 15 to prevent the mounting rod 40 from continuing to rise.

[0035] The rotating rod 20 is composed of several first rods 21 connected end to end. The rotating rod 20 is connected to the output end of the drive assembly 10. When the drive assembly 10 is working, the rotating rod 20 can be driven to rotate through the output end of the drive assembly 10. In turn, the rotation of the rotating rod 20 drives the lifting assembly 30, the mounting rod 40 and the lifting component installed on the mounting rod 40 to perform lifting and lowering movements.

[0036] In this embodiment, the first rods 21 are detachably connected, for example, through collars, sleeves, or snap-fit ​​components (such as irregularly shaped stacking buckles). The rotating rod 20, assembled from multiple detachably connected first rods 21, is easy to store before assembly, significantly reducing the volume of packaging and transportation, and effectively improving the volume ratio and space utilization of the packaging. When assembling the rotating rod 20, the required number of first rods 21 can be determined according to the actual working conditions, thereby forming rotating rods 20 of different lengths to adapt to different working conditions.

[0037] Understandably, to facilitate storage of the first rod 21 as a component, the first rod 21 can be configured with specific length and diameter according to packaging and transportation requirements. Furthermore, the multiple detachably connected first rods 21 also meet the basic requirement of stable installation.

[0038] The rotating rod 20 serves as the main drive shaft of the lifting device. It can be extended by connecting to the detachable first rod 21, and all lifting components 30 are mounted on this main drive shaft. When the rotating rod 20 rotates, the angular displacement at all mounting points is completely consistent, ensuring absolute synchronization from a mechanical principle perspective. This eliminates the need for complex electronic synchronization algorithms and ensures extremely high reliability.

[0039] A lifting assembly 30 is mounted on the first rod 21 and is used to pull and mount the rod 40. Each first rod 21 has one lifting assembly 30, meaning that the number of lifting assemblies 30 is equal to the number of first rods 21 and they are arranged in a one-to-one correspondence. Each lifting assembly 30 includes a rope 31, a hook 33, and a take-up assembly 32. The take-up assembly 32 is sleeved on the rotating rod 20, that is, the take-up assembly 32 is sleeved on the corresponding first rod 21. One end of the rope 31 is wound around the take-up assembly 32, and the take-up assembly 32 has a threaded take-up groove for accommodating the rope 31. The other end of the rope 31 has a hook 33.

[0040] In this embodiment, the lifting assembly 30 is provided with a take-up assembly 32. When the rotating rod 21 rotates, the take-up assembly 32 can smoothly wind the rope 31 around the threaded take-up groove, which can not only play the role of managing the rope, but also ensure that each rope 31 and the hanging rod 40 pulled by the rope 31 can be raised and lowered synchronously.

[0041] In this embodiment, the take-up assembly 32 specifically includes a first retainer 321, a second retainer 322, a first connector 323, a second connector 324, and a take-up ring 325, wherein, Both the first retaining sleeve 321 and the second retaining sleeve 322 extend axially. The outer walls of the first retaining sleeve 321 and the second retaining sleeve 322 are respectively provided with a first take-up groove and a second take-up groove. The inner walls of the first retaining sleeve 321 and the second retaining sleeve 322 are respectively provided with a first receiving cavity and a second receiving cavity. The two ends of the first retaining sleeve 321 and the second retaining sleeve 322 are connected by a first connecting member 323 and a second connecting member 324, respectively. The second connecting member is provided with a take-up ring 325 for the rope 31 to pass through. When the first retaining sleeve 321 and the second retaining sleeve 322 are connected to each other, the first take-up groove and the second take-up groove form the aforementioned threaded take-up groove. The first receiving cavity and the second receiving cavity together constitute the first rod cavity for the first rod 21 to pass through.

[0042] This design facilitates the installation of the take-up assembly 32 on each of the first rods 21. At the same time, the take-up ring 325 ensures that the end of the rope 31 does not deviate from the threaded take-up groove during the lifting and lowering process. Furthermore, the threaded take-up groove and the take-up ring 325 allow the rope 31 to be smoothly tightened.

[0043] More specifically, the first sleeve 321 has a first mounting hole and a second mounting hole at both ends, the second sleeve 322 has a third mounting hole and a fourth mounting hole at both ends, the first connector 323 has the first mounting hole and the third mounting hole in cooperation, and the second connector 324 has the second mounting hole and the fourth mounting hole in cooperation.

[0044] Both the first connector 323 and the second connector 324 can be fastening parts such as screws and studs, so that the installation of each take-up assembly 32 can be completed through the first connector 323 and the second connector 324.

[0045] In this embodiment, a counterweight 34 is provided at one end of the hook 33 that is connected to the second rod. The counterweight 34 is used to straighten the rope 31 so that it can be smoothly wound around the corresponding threaded take-up groove when the line is taken up.

[0046] The mounting pole 40 is composed of several second poles 41 connected end to end, with each rope connected to a second pole via a hook. Components to be raised or lowered, such as plant grow lights in the planting industry or curtains in the performing arts industry, can be mounted on the mounting pole 40. When the drive assembly 10 is working, its output drives the rotating pole 20 to rotate, which in turn drives the lifting assembly 30, the mounting pole 40, and the components mounted on it to move up and down. Thus, a single drive assembly 10 can handle the synchronous raising and lowering of multiple mounting points on the mounting pole 40, increasing efficiency in the manufacturing process, reducing manufacturing costs associated with equivalent actions, minimizing repetitive manual operations, and increasing overall efficiency.

[0047] Similarly, in this embodiment, the second rods 41 are detachably connected, for example, through collars, sleeves, or snap-fit ​​components (such as irregularly shaped stacking buckles). The mounting rod 40, assembled from multiple detachably connected second rods 41, is easy to store before assembly, greatly reducing the volume of packaging and transportation, and effectively improving the volume ratio and space utilization of the packaging. When assembling the mounting rod 40, the required number of second rods 41 can be determined according to the actual working conditions, thereby forming mounting rods 40 of different lengths to adapt to different working conditions.

[0048] Several support components 50 are disposed on the rotating rod 20, rotatably connected to the rotating rod 20, and the support components 50 are used for fixed connection with the installation position.

[0049] In this embodiment, the lifting device can be installed at a preset installation position by means of several support components 50.

[0050] It should be noted that the number of support components 50 required is determined based on the length of the rotating rod 20, and the number of support components 50 does not need to be equal to the number of the first rod 21.

[0051] In this embodiment, the support component 50 specifically includes a first mounting base 51, a rotating base 52, a first mounting member 53, and a second mounting member 54. The rotating base 52 is provided with a rotating sleeve 55, and the first rod body 21 is rotatably connected to the rotating sleeve 55. The rotating base 52 is connected to the first mounting base 51 through the first mounting member 53. The rotating base 52 is provided with a connecting gasket, and the rotating base 52 is mounted on the first mounting base 51 through the connecting gasket. The first mounting member 53 is connected to the first mounting base 51 through the connecting gasket. The first mounting base 41 is connected to the installation position through the second mounting member 54. The rotating sleeve 55 is equivalent to a rotating guide sleeve to ensure the smooth rotation of the main drive shaft.

[0052] The first mounting component 53 and the second mounting component 54 can both be fastening parts such as screws and studs, so that the installation of each support component 50 can be completed through the first mounting component 53 and the second mounting component 54.

[0053] The lifting device of this utility model: The drive assembly 10 drives the rotating rod 20, which serves as the main drive shaft, ensuring absolute synchronization of all lifting points on the rotating rod 20. This eliminates the potential errors, delays, and malfunctions associated with electronic synchronization, resulting in high synchronization accuracy and reliable operation. Both the rotating rod 20 and the mounting rod 40 are composed of multiple rods connected end to end. This modular installation design facilitates storage before assembly, significantly reducing the volume of packaging and transportation, and effectively improving the volume ratio and space utilization of the packaging. When assembling the rotating rod 20 and the mounting rod 40, the required number of first rods 21 can be determined according to the actual working conditions, thereby forming rotating rods 20 and mounting rods 40 of different lengths to adapt to different working conditions. By increasing or decreasing the number of first rods 21 of the rotating rod 20, the number of lifting components 30 can be increased or decreased accordingly, allowing for flexible configuration of the number and spacing of lifting points to meet span requirements from several meters to tens of meters or even longer, with a very wide range of applications. The threaded winding groove on the winding component 32 enables a single lifting component 30 to both fulfill lifting requirements and smoothly wind up the line. The single drive source drive component 10 saves the cost of multiple drive sources and complex control systems. Mechanical synchronization reduces the complexity and cost of the control system, thereby reducing production costs.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A lifting device, characterized in that, include: Driver components; The rotating rod is composed of several first rods connected end to end, and the rotating rod is connected to the output end of the drive assembly; A lifting assembly is mounted on the first pole body and is used to pull and hang the pole body. Each first pole body is provided with one of the lifting assemblies. Each lifting assembly includes a rope, a hook, and a take-up assembly. The take-up assembly is sleeved on the rotating pole body. One end of the rope is wound around the take-up assembly. The take-up assembly is provided with a threaded take-up groove for accommodating the rope. The other end of the rope is provided with a hook. The mounting pole is composed of several second poles connected end to end, and each of the ropes is connected to a second pole through the hook; Several support components are disposed on the rotating rod body, rotatably connected to the rotating rod body, and the support components are used for fixed connection with the installation position.

2. The lifting device according to claim 1, characterized in that, The take-up assembly includes a first ferrule, a second ferrule, a first connector, a second connector, and a take-up ring; Both the first and second sleeves extend axially. The outer walls of the first and second sleeves are respectively provided with a first take-up groove and a second take-up groove. The inner walls of the first and second sleeves are respectively provided with a first receiving cavity and a second receiving cavity. The two ends of the first and second sleeves are respectively connected by the first connector and the second connector. The second connector is provided with a take-up loop for the rope to pass through. After the first ferrule and the second ferrule are connected to each other, the first take-up groove and the second take-up groove form the threaded take-up groove, and the first receiving cavity and the second receiving cavity together constitute the first rod cavity through which the first rod body passes.

3. The lifting device according to claim 2, characterized in that, The first sleeve has a first mounting hole and a second mounting hole at both ends, and the second sleeve has a third mounting hole and a fourth mounting hole at both ends. The first connector mates with the first mounting hole and the third mounting hole, and the second connector mates with the second mounting hole and the fourth mounting hole.

4. The lifting device according to claim 1, characterized in that, The support assembly includes a first mounting base, a rotating base, a first mounting component, and a second mounting component; The rotating seat is provided with a rotating sleeve, the first rod body is rotatably connected to the rotating sleeve, the rotating seat is connected to the first mounting seat through the first mounting component, and the first mounting seat is connected to the installation position through the second mounting component.

5. The lifting device according to claim 4, characterized in that, The rotating seat is provided with a connecting gasket, the rotating seat is mounted on the first mounting seat through the connecting gasket, and the first mounting component is connected to the first mounting seat through the connecting gasket.

6. The lifting device according to claim 1, characterized in that, The drive assembly is connected to the second mounting base via a drive mounting base, and the second mounting base is connected to the mounting position via a third mounting component.

7. The lifting device according to claim 1, characterized in that, A counterweight is provided at the end of the hook that is connected to the second rod.

8. The lifting device according to claim 1, characterized in that, The first rods are detachably connected.

9. The lifting device according to claim 1, characterized in that, The second rod is detachably connected to the first rod.

10. The lifting device according to claim 1, characterized in that, The drive component is equipped with a limit protection component.

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